08.08.2015   BIOMASS NOW - SUSTAINABLE GROWTH AND USE

Growth analysis of rice varieties

Most climate change studies benefit from crop models. Crop simulation models could provide an alternative, less time-consuming and inexpensive means of determining the optimum crop N requirements under management nitrogen conditions. The model ORYZA2000, which simulates the growth and development of rice under conditions of potential production, water and nitrogen limitations, Results of growth indices analysis of rice varieties "Figure 8" showed that breed varieties (Khazar, Hybrid and Gohar) higher growth indices rather than Hashemi local varieties (Hashemi and Alikazemi). Azarpour et al. [3] with study Evaluation of the ORYZA2000 model of rice cultivars in Guilan climate condition showed that the model ORYZA2000 can satisfactorily in Simulates processes of growth and development and grain yield of rice cultivars under weather conditions of Guilan. Therefore validated ORYZA2000 model can apply to research purposes for rice cultivars under weather conditions of Guilan.

Item

Yield

Input

energy

Output Energy energy Ratio

Energy Energy intensity productivity

Net

energy

gain

Water and energy productivity

Paddy yield

1

Input energy

0.91**

1

Output energy

0.99**

0.91**

1

Energy ratio

0.99**

0.86**

0.99**

1

Energy intensity

-0.97**

-0.90**

-0.97**

-0.97**

1

Energy productivity

0.98**

0.84**

0.98**

0.99**

-0.96**

1

Net energy gain

0.99**

0.89**

0.99**

0.99**

-0.97**

0.99**

1

Water and energy productivity

0.99**

0.87**

0.99**

0.99**

-0.97**

0.99**

0.99**

1

Straw yield

1

Input energy

0.92**

1

Output energy

0.99**

0.92**

1

Energy ratio

0.99**

0.87**

0.99**

1

Energy intensity

-0.96**

-0.83**

-0.96**

-0.96**

1

Energy productivity

0.99**

0.88**

0.99**

0.99**

-0.96**

1

Net energy gain

0.99**

0.90**

0.99**

0.99**

-0.96**

0.99**

1

Water and energy productivity

0.99**

0.87**

0.99**

0.99**

-0.97**

0.99**

0.99**

1

Husk yield

1

Input energy

0.92**

1

Output energy

0.99**

0.92**

1

Energy ratio

0.99**

0.87**

0.99**

1

Energy intensity

-0.96**

-0.88**

-0.96**

-0.96**

1

Energy productivity

0.92**

0.77**

0.92**

0.95**

-0.94**

1

Net energy gain

0.93**

0.71**

0.93**

0.96**

-0.89**

0.93**

1

Water and energy productivity

0.95**

0.84**

0.95**

0.96**

-0.93**

0.96**

0.92**

1

Biomass yield

1

Input energy

0.92**

1

Output energy

0.99**

0.92**

1

Energy ratio

0.99**

0.87**

0.99**

1

Energy intensity

-0.96**

-0.89**

-0.96**

-0.97**

1

Energy productivity

0.99**

0.97**

0.99**

0.99**

-0.97**

1

Net energy gain

0.99**

0.91**

0.99**

0.99**

-0.96**

0.99**

1

Water and energy productivity

0.99**

0.87**

0.99**

0.99**

-0.97**

0.99**

0.99**

1

**and*respectively significant in 1% and 5% area

Table 17. Correlation of energy indices for rice production

Figure 8. Simulation and measured of biomass of leaves (o), stem (◊), panicles (▲), and total aboveground biomass (■)